For me, it's bad. I don't like single target tanking at all. I picked my class because it excelled at AOE tanking (pally), but now it seems all that is gonna be useless in cataclysm. Now before you flame saying I'm some idiot who can't tank or CC or etc, I wasn't around at level cap in vanilla or BC.
What I find fun is multiple targets at once in my face. I don't like going CC this, CC that, then I'll tank this mob until it's dead. Then move on to the next one. That's just really boring to me.
What do you think about CC being brought back in Cata?